"This is a big step in holding Monsanto accountable," the teachers' attorney, Rick Friedman, said in a statement.
The recent scandals around Boeing, Facebook, Phillip Morris, Wells Fargo and Monsanto all tell the same tale.
Countries around the world have taken steps to ban or restrict glyphosate, but there is no federal ban in the U.S. on the chemical compound.
"We were finally able to show the jury the secret, internal Monsanto documents proving that Monsanto has known for decades that Roundup could cause cancer."
There are some general guidelines for what kind of science is allowed to be considered in a court of law.
Monsanto is appealing the ruling that classifies the herbicide glyphosate, the main ingredient in Roundup, as a known carcinogen.
How the insects are exposed to all these chemicals is unclear, but the pesticides could be contributing to bee decline.
Bayer aims to create the world's biggest agricultural supplier and take advantage of converging pesticides and seeds markets.